Reply To: Multiplying values from Input fields

[Kingslayer]

I got alot further now =) The 2 fields are multiplied and written into a new field.
Than these new fields are added together. Problem here is, that it adds all the fields on the page, not only the ones directly above this certain sumfield. Its hard to describe but i hope the codepen makes it clear what i want to achieve =).

Here is what i have so far !

http://codepen.io/anon/pen/kzgmJ

(anon/pen/kzgmJ) link to the pen as it never shows up for me when i post.

Hopefully someone can point me in the right direction =).

Thanks in advance